Baron, Mark and Gonzalez-Rodriguez, Jose and Croxton, Ruth and Gonzalez, Rafael and Jimenez-Perez, Rebeca (2011) Chemometric study on the forensic discrimination of soil types using their infrared spectral characteristics. Applied Spectroscopy, 65 (10). pp. 1151-1161. ISSN 0003-7028

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Abstract

Soil has been utilized in criminal investigations for some time because of its prevalence and transferability. It is usually the physical characteristics that are studied, however the research carried out here aims to make use of the chemical profile of soil samples. The research we are presenting in this work used sieved (2mm) soil samples taken from the top soil layer (about 10cm) that were then analysed using mid infrared spectroscopy. The spectra obtained were pre-treated and then input into two chemometric classification tools: Nonlinear iterative partial least squares followed by linear discriminant analysis (NIPALS-LDA) and partial least squares discriminant analysis (PLS-DA). The models produced show that it is possible to discriminate between soil samples from different land use types and both approaches are comparable in performance. NIPALS-LDA performs much better than PLS-DA in classifying samples to location

Item Type:	Article
Keywords:	soil, chemiometrics, FTIR, forensic science, ATR, NIPALS-LDA, ref03, refdoi
Subjects:	F Physical Sciences > F870 Soil Science F Physical Sciences > F110 Applied Chemistry F Physical Sciences > F410 Forensic Science F Physical Sciences > F100 Chemistry F Physical Sciences > F180 Analytical Chemistry
Divisions:	College of Sciences > Faculty of Science > School of Life Sciences
Depositing User:	Jose Gonzalez-Rodriguez
Date Deposited:	29 Nov 2011 19:29
Last Modified:	08 May 2013 15:32
URI:	http://eprints.lincoln.ac.uk/id/eprint/4807

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